Development of the structure of podzolics and latosols derivate from granulite in humid zone

Detalhes bibliográficos
Autor(a) principal: Pessôa, Sérgio Costa Pinto
Data de Publicação: 2014
Outros Autores: Riché, Gilles Robert, Silva, Fernando Barreto Rodrigues e
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/16576
Resumo: In order to determine the facture that influence the formation of the structure of the B horizon of Podzolics and Latosols, four profiles were studied. These profiles are located in the Cacao Zone of Bahia. The climate of the area is the Af of Köppen. Based in the morphological, physical, chemical, mineralogical and micromorphological data of profiles, new mineralogical studies of the fraction <2 µ were developed. In these studies were use X-ray diffractometer and electron microscope, interpretation of results of free iron (Tamm) and total iron (HCI), as well as analyses of curves obtained through the method of Kinetic extraction, aiming the identification of possible amorphous of iron and alumina. As regards the mineralogy of the fraction <2 µ, it was verified a relation between the predominance of halloysite (7Å) and structure moderate very fine angular and subangular blocky; it was also verified that the predominance of kaolinite with or without disorder in the b axis and/or gibbsite was related to ultra fine granular structure, called "coffee powder". No relation was found between floculation degree and structure. The clays are very flocculated in all horizons (GF 90 to 100%).
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spelling Development of the structure of podzolics and latosols derivate from granulite in humid zoneDesenvolvimento da estrutura de podzólicos e latossolos derivados de granulitosmorphology (structure); mineralogymorfologia (estrutura); mineralogiaIn order to determine the facture that influence the formation of the structure of the B horizon of Podzolics and Latosols, four profiles were studied. These profiles are located in the Cacao Zone of Bahia. The climate of the area is the Af of Köppen. Based in the morphological, physical, chemical, mineralogical and micromorphological data of profiles, new mineralogical studies of the fraction <2 µ were developed. In these studies were use X-ray diffractometer and electron microscope, interpretation of results of free iron (Tamm) and total iron (HCI), as well as analyses of curves obtained through the method of Kinetic extraction, aiming the identification of possible amorphous of iron and alumina. As regards the mineralogy of the fraction <2 µ, it was verified a relation between the predominance of halloysite (7Å) and structure moderate very fine angular and subangular blocky; it was also verified that the predominance of kaolinite with or without disorder in the b axis and/or gibbsite was related to ultra fine granular structure, called "coffee powder". No relation was found between floculation degree and structure. The clays are very flocculated in all horizons (GF 90 to 100%).Visando a esclarecer os fatores que influenciam a formação da estrutura do horizonte B de Podzólicos e Latossolos, foram estudados quatro perfis de solos localizados na zona cacaueira da Bahia, sob clima Af de Köppen. Com base nos dados morfológicos e micromorfológicos dos perfis, foram realizados outros estudos mineralógicos da fração<2 µ por difração de raios X e microscopia eletrônica, interpretação de resultados de ferro livre (Tamm) e ferro total (HCI), é efetuadas análises de curvas obtidas pelo método de extração cinética, com o objetivo de identificar possíveis amorfos de ferro e alumina. Pelo relacionamento entre a mineralogia da fração <2 µ e os resultados do ferro livre, constatou-se que este aparece na forma de goetita microcristalizada. Nesta, não se observou variação de cristalinidade em função do tipo de estrutura dos solos. Não foi evidenciada a presença de amorfos. Quanto aos resultados da mineralogia da fração <2 µ, verificou-se o relacionamento entre o predomínio da haloisita (7Å) e a estrutura moderada em blocos muito pequenos e pequenos, angulares e subangulares, enquanto o predomínio de caulinita, com ou sem desordem no eixo b e/ou gibbsita, relacionou-se com estrutura ultrapequena granular, do tipo "pó-de-café". Verificou-se também que não houve relação entre grau de floculação e estrutura. As argilas são muito bem floculadas em todos horizontes (GF de 90 a 100%).Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPessôa, Sérgio Costa PintoRiché, Gilles RobertSilva, Fernando Barreto Rodrigues e2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16576Pesquisa Agropecuaria Brasileira; v.15, n.3, mar. 1980; 319-328Pesquisa Agropecuária Brasileira; v.15, n.3, mar. 1980; 319-3281678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16576/10857info:eu-repo/semantics/openAccess2014-04-15T19:32:36Zoai:ojs.seer.sct.embrapa.br:article/16576Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T19:32:36Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Development of the structure of podzolics and latosols derivate from granulite in humid zone
Desenvolvimento da estrutura de podzólicos e latossolos derivados de granulitos
title Development of the structure of podzolics and latosols derivate from granulite in humid zone
spellingShingle Development of the structure of podzolics and latosols derivate from granulite in humid zone
Pessôa, Sérgio Costa Pinto
morphology (structure); mineralogy
morfologia (estrutura); mineralogia
title_short Development of the structure of podzolics and latosols derivate from granulite in humid zone
title_full Development of the structure of podzolics and latosols derivate from granulite in humid zone
title_fullStr Development of the structure of podzolics and latosols derivate from granulite in humid zone
title_full_unstemmed Development of the structure of podzolics and latosols derivate from granulite in humid zone
title_sort Development of the structure of podzolics and latosols derivate from granulite in humid zone
author Pessôa, Sérgio Costa Pinto
author_facet Pessôa, Sérgio Costa Pinto
Riché, Gilles Robert
Silva, Fernando Barreto Rodrigues e
author_role author
author2 Riché, Gilles Robert
Silva, Fernando Barreto Rodrigues e
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Pessôa, Sérgio Costa Pinto
Riché, Gilles Robert
Silva, Fernando Barreto Rodrigues e
dc.subject.por.fl_str_mv morphology (structure); mineralogy
morfologia (estrutura); mineralogia
topic morphology (structure); mineralogy
morfologia (estrutura); mineralogia
description In order to determine the facture that influence the formation of the structure of the B horizon of Podzolics and Latosols, four profiles were studied. These profiles are located in the Cacao Zone of Bahia. The climate of the area is the Af of Köppen. Based in the morphological, physical, chemical, mineralogical and micromorphological data of profiles, new mineralogical studies of the fraction <2 µ were developed. In these studies were use X-ray diffractometer and electron microscope, interpretation of results of free iron (Tamm) and total iron (HCI), as well as analyses of curves obtained through the method of Kinetic extraction, aiming the identification of possible amorphous of iron and alumina. As regards the mineralogy of the fraction <2 µ, it was verified a relation between the predominance of halloysite (7Å) and structure moderate very fine angular and subangular blocky; it was also verified that the predominance of kaolinite with or without disorder in the b axis and/or gibbsite was related to ultra fine granular structure, called "coffee powder". No relation was found between floculation degree and structure. The clays are very flocculated in all horizons (GF 90 to 100%).
publishDate 2014
dc.date.none.fl_str_mv 2014-04-15
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/16576
url https://seer.sct.embrapa.br/index.php/pab/article/view/16576
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/16576/10857
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.15, n.3, mar. 1980; 319-328
Pesquisa Agropecuária Brasileira; v.15, n.3, mar. 1980; 319-328
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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